“Hot spots” of N and C impact nitric oxide, nitrous oxide and nitrogen gas emissions from a UK grassland soil

Summary

This field study investigates how localised application of nitrogen and carbon ('hot spots') influences gaseous nitrogen emissions from grassland soils in the United Kingdom. The authors report that concentrated nutrient inputs may extend nitrogen residence time in soil, thereby reducing nitric oxide emissions whilst potentially enhancing plant nutrient acquisition. If these effects generalise across broader soil types and environmental conditions, the findings could inform fertiliser application strategies to simultaneously minimise atmospheric nitrogen losses and sustain nutrient use efficiency.

UK applicability

Conducted on UK grassland soil, the study is directly applicable to British farming conditions. However, the authors indicate that the implications for fertiliser application protocols would require validation across a wider range of UK soil types and climatic conditions before operational adoption.

Key measures

Nitric oxide (NO), nitrous oxide (N₂O), and nitrogen gas (N₂) emissions; nitrogen residence time in soil; plant nutrient uptake efficiency

Outcomes reported

The study examined how spatial concentration of nitrogen and carbon inputs ('hot spots') affects gaseous nitrogen emissions (nitric oxide, nitrous oxide, and nitrogen gas) from UK grassland soil. The research measured emission rates and residence time of applied nitrogen under different soil conditions.

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